1. If we remain inveterate smokers, it is only because we have so often experienced the frustration that results from failure.
    如果我们烟瘾大，戒不掉，那是因为屡戒屡败，失去信心。

2. In love, two beings become one and yet remain two.
    两个人由于爱合二为一，又仍是两个独立的个体。

3. Why some people remain upbeat in the face of troubles that would sink a less resistant soul.
    为什么有些人面对困难仍能保持乐观，而另一些人则坚持不住，沉沦下去。